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参数资料
| 型号： | S29CD032J1MFAI020 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 1M X 32 FLASH 2.7V PROM, 54 ns, PBGA80 |
| 封装： | 13 X 11 MM, 1 MM PITCH, FORTIFIED, BGA-80 |
| 文件页数： | 46/78页 |
| 文件大小： | 1825K |
| 代理商： | S29CD032J1MFAI020 |
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48
S29CD-J & S29CL-J Flash Family
S29CD-J_CL-J_00_B1 September27,2006
Prel imi n ary
9. The Secured Silicon Sector Entry command is allowed when the device is in either program
or erase suspend modes. If the Secured Silicon sector is enabled, the program or erase sus-
pend command is ignored. This prevents resuming either programming or erasure on the
Secured Silicon sector if the overlayed sector was undergoing programming or erasure. The
host system must ensure that the device resume any suspended program or erase operation
after exiting the Secured Silicon sector.
10.1
Secured Silicon Sector Protection Bit
The Secured Silicon Sector can be shipped unprotected, allowing customers to utilize that sector
in any manner they choose.
Please note the following:
The Secured Silicon Sector can be read any number of times, but
can be programmed and locked only once. The Secured Silicon
Sector Protection Bit must be used with caution as once locked,
there is no procedure available for unlocking the Secured Silicon
Sector area and none of the bits in the Secured Silicon Sector
memory space can be modified in any way.
Once the Secured Silicon Sector is locked and verified, the system
must write the Exit Secured Silicon Sector Region command se-
quence to return the device to the memory array.
10.2 Secured Silicon Sector Entry and Exit Commands
The system can access the Secured Silicon Sector region by issuing the three-cycle Enter Se-
cured Silicon Sector command sequence. The device continues to access the Secured Silicon
Sector region until the system issues the four-cycle Exit Secured Silicon Sector command se-
quence. See the Table 20.1, Memory Array Command Definitions (x32 Mode), on page 71 and
Table 20.2, Sector Protection Command Definitions (x32 Mode), on page 72 for address and data
requirements for both command sequences.
The Secured Silicon Sector Entry Command allows the following commands to be executed
Read Secured Silicon areas
Program Secured Silicon Sector (only once)
After the system has written the Enter Secured Silicon Sector command sequence, it can read
the Secured Silicon Sector by using the addresses listed in Table 10.1, Secured Silicon Sector
Addresses on page 47. This mode of operation continues until the system issues the Exit Secured
Silicon Sector command sequence, or until power is removed from the device.
11 Electronic Marking
Electronic marking has been programmed into the device, prior to shipment from Spansion, to
ensure traceability of individual products. The electronic marking is stored and locked within a
one-time programmable region. Detailed information on Electronic Marking will be provided in a
datasheet supplement.
12 Power Conservation Modes
12.1
Standby Mode
When the system is not reading or writing to the device, it can place the device in standby mode.
In this mode, current consumption is greatly reduced, and outputs are placed in a high imped-
ance state, independent of OE# input. The device enters CMOS standby mode when the CE# and
RESET# inputs are both held at VCC ± 0.2 V. The device requires standard access time (tCE) for
read access before it is ready to read data. If the device is deselected during erasure or program-
ming, the device draws active current until the operation is completed.
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| S29CL016J0MQFM030 | 制造商:Spansion 功能描述: |
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